Exothermic device



March s, 1938. 'l ERACEN 2,110,671

. EXOTHERMIG DEVICE Fired sept.- 50 1955,

ReadMe-Mw l A2,110,611'

@UNITED STATES PATENT ori-lcs EXOTHERMIC DEVICE Ferdinand Racen, Webster Groves, Mo., assignor to W. G. Shelton Company, St. Louis, Mo., a corporation of Missouri Application september so, 1935, serial No. 42",':21 7 claims. (ol. isz-36.2)

The invention relates to exothermic pads such a closed envelope for the exothermic material or as are used particularly in the waving of human substance 3 which may include calcium oxide hair, and the invention consists in a novel `con or other ingredients commonly used for similar tairier for the exothermic rrraterial and in the purposes.

5 means and method of applying moisture or other Preferably, back member l will be of aluminum 5 agent to the exothermic material to start the foil or other flexible, impervious material. Front chemical reaction thereof. member 2 is preferably yformeel of paper, cloth. or

It has been the general practice in using suchv similar material characterized by the quality of pads to tightly seal the exothermic material in a being able to transmit moisture quickly by capilclosed envelope which the operator would perlary attraction throughout its width and length l0 forate at the time of applying the pad to the and particularly from face to face. y

tress of hair so that moisture from! a saturated The portions ,of members l and 2 adjacent all element applied to the exothermic pad would four edges of the pad are cemented together combine with the exothermic material to4 start and folded over as illustrated at 4 to form a the chemical reaction. In some instances, the tight seal. Vl5

envelope would be perforated at the time of man- In applying the pad to a. tress of hair, a sheet ufacture of the pad and the perforations tem- 5 of flannel, or similar absorbent material, is

porarily closed, more or less effectively, by a dipped in water or other suitable reaction start` member to be removed by the operator at the ing liquid. and is laid over the inner face of time of applying the pad to the tress of hair. member 2 of the pad. The pad and treated sheet 20 v With either of these constructions, or other 5 are immediately applied to the tress of hair, similar adaptations of the exothermic pad, there being wrapped closely around the same and seis an undesirable sifting out or leakage of the cured in vplace by a clamp such as is ln general exothermic material from the interior of its enuse. Member 2 operates automatically to transvelope which is not only unsightly but is othermit moisture from sheet 5 to its inner face and 25 wise objectionable because the exothermic mato the adjacent particles of the exothermic mateterial contacting with mpisturel'on the skin, lips, rial. The resulting exothermlc reaction generor eyes of the operator and the customer, may ates sumcient heat to set the hair in the usual cause discomfort or even inlilct'substantial inmanner. juries. No part of the pad is perforated at any time 30 The main object of the present invention is and it is unnecessary for those handling the to retain the entire quantity of exothermic ma- .completed pads to take precautions against the terial within the pad at all times, during its use presence of the exothermic material Where it is as well as up to the period of us'e, and thereby not wanted during the packing, shipping, or use 35 avoid the leakage referred to above. of the pad.

Another object of the invention is to trans- It has been found that a paper formed of mit moisture or other starting agent to the exopineapple husk fibre and approximately .004 of thermic material over a substantial area of the an inch in thickness constitutes an excellent malatter as distinguished from' restricted points terial for the inner member 2 of the pad, but

i 4 only. it will be understood that sheets of thin blotting 40 These and.l other detail objects of the invenpaper or other papers or fabrics of silk, linen, tion will be apparent from the following detailed cotton, or other material, having the liquid transdescription and by reference to the accompany-` missive characteristic referred to, may be used ing drawing, in whichl, for the inner member of the pad. The complete Figure 1 is a view of an exothermic pad emenvelope for the exotherm'ic mix may be formed 45 bodying the invention and showing the member of the liquid transmitting material and may containing the reaction starting agent applied have aV backing of foil or'the like applied to one to the pad. face without being folded over andcemented at Figure 2 is a transverse section takensubstanthe edges as shown. f v 50 tially on the line 2-2 of Figure 1 but is drawn Heavier paper, parchment, or other foils may on an enlarged scale to more clearly -illustrate be substituted for the aluminum foil indicated the structure. 1 as preferred in the formation of back member I z The pad consists essentially in a back member of the pad. Reaction star-ting liquid may be ap- 56 l and a front member 2 forming the walls of plied tothe inner face 2 of the pad by directly 55 moistening the same with a. brush or otherwise instead of relying upon its being moistened from the lusual flannel wrapping. Substituting different materials as suggested and varying the means vof applying moisture to the pad and other modiiications of the invention may be made without departing from the scope of the invention as expressed in the claims and the exclusive use of all such modifications is contemplated.

I claim:

l. As a complete unit of manufacturel and application, a container, and exothermic substance therein, at least a portion of said container in contact with said substance being of imperforate material which readily transmits a liquid therethrough and another portion of said container in contact with said substance being of material which is highly resistant to the passage of moisture therethrough.

2. An imperforate envelope for containing exothermic material and applicable therewith as an individual unit to a tress of hair, one wall of said envelope being of material characterized by a high degree of capillarity, the remainder of said envelope being of metal foil.

3. A hair waving pad consisting of an imperiorate envelope, exothermic material therein, one wall of said envelope being of material having a high degree of capillary attraction for moisture and the remainder of said envelope being of formsustaining material relatively impervious to moisture, said elements constituting a unit applicable to Aa tress of hair independently of other pad structure for retaining exothermic material and for distributing moisture thereto.

4. As a complete article of manufacture, a hair waving pad consisting solely of a at envelope having one wall of material having a high degree of capillary attraction for moisture, and having another wall of material substantially impervious to moisture, the adjacent edge portions of said walls being cemented together and folded over to form a closed envelope, and an exothermic substance contained in said envelope.

5. A container for powdered exothermic chemicals, said container comprising an envelope with one of its side 'walls consisting of a single thickness of lmperforate material of insufficient thickness to possess substantial absorbent value but having a high degree of capillary attraction for moisture and with the other of its side walls consisting of a single thickness of imperforate material which is substantially impervious to moisture.

6. A container for powdered exothermic chemicals, said container comprising an envelope with one of its side walls consisting of a single thickness of paper made from pineapple husks and with the other of its side walls consisting of a. single thickness of flexible metal foil of sumcient thickness and stiffness to hold the envelope and its contents in curved position enclosing a tress of hair for a waving operation.

7. As a complete article of manufacture, a hair waving pad consisting of an imperforate envelope, exothermic material therein, one wail of said envelope being of imperforate paper formed of pineapple husk fibres for transmitting moisture by capillary attraction and the other wall of said envelope being formed of metal foil of suiiicient stiiness to holdthe complete pad in position about a tress of hair to which it is applied.

FERDINAND RACEN. 

